coccigrep is a semantic grep for the C language based on coccinelle.
It can be used to find where a given structure is used in code files.

- find where struct bpf_program is used:
coccigrep -t 'struct bpf_program' *c

- find where bf_len in struct bpf_program is used:
coccigrep -t 'struct bpf_program' -a bf_len *c

- find where bf_len in struct bpf_program is *set*:
coccigrep -t 'struct bpf_program' -a bf_len -o set *c
